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. Author manuscript; available in PMC: 2009 Dec 2.
Published in final edited form as: J Mol Biol. 2008 Nov 5;385(2):432–445. doi: 10.1016/j.jmb.2008.10.067

Fig. 3.

Fig. 3

The FRET index was plotted against the acceptor levels for nonstimulated samples. All data points (ROIs) included have similar A/D ratios, and the FRET index shows little dependence on the receptor levels.